持久化表情中文语义资产\n\n- 新增 t_emoji_assets 表及迁移脚本，持久化保存表情发送参数、中文语义与预览图路径\n- 在消息归档与媒体补偿流程中自动回填表情资产，实现收到表情即落语义、补图后回填预览\n- 后台表情库与自动回复优先读取持久化表情资产，仅在空表场景下小范围回补历史数据

admin/dashboard/server.py

@@ -12,6 +12,7 @@ from loguru import logger
 
 from db.contacts_db import ContactsDBOperator
 from db.admin_account_db import AdminAccountDBOperator
+from db.emoji_asset_db import EmojiAssetDB
 from db.member_context_db import MemberContextDBOperator
 from db.message_storage import MessageStorageDB
 from db.stats_db import StatsDBOperator
@@ -46,6 +47,7 @@ class DashboardServer:
             self.db_manager = robot_instance.db_manager
             self.stats_db = StatsDBOperator(self.db_manager)
             self.message_storage = MessageStorageDB(self.db_manager)
+            self.emoji_asset_db = getattr(robot_instance.message_storage, "emoji_asset_db", None) or EmojiAssetDB(self.db_manager)
             self.contact_db: ContactsDBOperator = ContactsDBOperator(self.db_manager)
             self.member_context_db = MemberContextDBOperator(self.db_manager)
             self.task_db: TaskDBOperator = TaskDBOperator(self.db_manager)